Your comment amounts to saying that some of the randomly generated data really is consistently over estimating it's performance. How absurd. Like similar analy

Your comment amounts to saying that some of the randomly generated data really is consistently over estimating it's performance. How absurd. Like similar analyses here you don't factor in that DK is about bias. Of course you can't see bias when test score=self assessment. That's because "IF everyone perfectly knows their score then there is no bias in their assessment" is a tautology.